Use the search box at the top of this site and enter "diff". CP has a lot of articles and sample code about this topic regards

In addition, the source code to WinDiff is available. I, for one, do not think the problem was that the band was down. I think that the problem may have been that there was a Stonehenge monument on the stage that was in danger of being crushed by a dwarf. -David St. Hubbins